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<h1 class="topictitle1">Restoring the System State of Active Directory in the Scenario with a Single Domain Controller</h1>
<div><p>This section describes how to restore the system state of Active Directory to the original location using an Active Directory copy that has been backed up in the scenario with a single domain controller.</p>
<p>Backup copies, replication copies (only reverse replication copies can be used for restoration to the original location), and archive copies can be used for restoration. Data can be restored to the original location.</p>
<div class="section"><h4 class="sectiontitle">Prerequisites</h4><ul><li id="activedirectory_00044__li178221624154012">Before restoration, ensure that the remaining space of the data directory at the target location for restoration is greater than the size of the copy used for restoration before reduction. Otherwise, restoration will fail.</li><li id="activedirectory_00044__li18852195913588">Before restoring the system state, ensure that the Active Directory domain controller has entered the DSRM..</li><li id="activedirectory_00044__li1475620131327">Active Directory system state restoration applies to scenarios where the Active Directory domain controller cannot be started, the Active Directory database is damaged, or the registry or system file is damaged.</li></ul>
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<div class="section"><h4 class="sectiontitle">Precautions</h4><ul><li id="activedirectory_00044__li4944728151413">When restoring the system state, do not shut down the domain controller or disconnect it from the network.</li><li id="activedirectory_00044__li1094422814148">After the system state is restored, the domain controller automatically restarts and enters the DSRM. You need to manually exit the DSRM to ensure that the domain controller enters the normal mode. For details, see <a href="en-us_topic_0000002060651416.html">Configuring a Windows Server to Exit the Directory Services Repair Mode</a>.</li></ul>
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<div class="section"><h4 class="sectiontitle">Procedure</h4><ol><li><span>Choose <span class="uicontrol" id="activedirectory_00044__en-us_topic_0000001839142377_uicontrol193721239145518"><b>Explore &gt; Applications &gt; Active Directory</b></span>.</span></li><li id="activedirectory_00044__li888616341964"><span>You can search for copies by Active Directory resource or copy. This section describes how to search for copies by resource.</span><p><p id="activedirectory_00044__en-us_topic_0000001397321757_p624620403810">Locate the resource to be restored by resource name and click the resource name.</p>
</p></li><li id="activedirectory_00044__li7341134224"><span>Click the <strong id="activedirectory_00044__b59261548204418">Copy Data</strong> tab.</span></li><li id="activedirectory_00044__li182120214713"><span>Select the year, month, and day in sequence to find the copy.</span><p><p id="activedirectory_00044__p9918150182310">If <span><img id="activedirectory_00044__image669318410309" src="en-us_image_0000001798060860.png"></span> is displayed below a month or date, copies exist in the month or on the day.</p>
</p></li><li id="activedirectory_00044__li52205391340"><span>In the row of the copy to be used for restoration, choose <span id="activedirectory_00044__text2864554113918"><strong>More</strong></span> &gt; <strong id="activedirectory_00044__b1434823142919">System State Restoration</strong> to configure restoration parameters.</span><p><p id="activedirectory_00044__p7323194318125"><a href="#activedirectory_00044__table194961441141219">Table 1</a> describes the related parameters.</p>

<div class="tablenoborder"><a name="activedirectory_00044__table194961441141219"></a><a name="table194961441141219"></a><table cellpadding="4" cellspacing="0" summary="" id="activedirectory_00044__table194961441141219" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Active Directory restoration parameters</caption><colgroup><col style="width:19.97%"><col style="width:80.03%"></colgroup><thead align="left"><tr id="activedirectory_00044__row849615417124"><th align="left" class="cellrowborder" valign="top" width="19.97%" id="mcps1.3.5.2.5.2.2.2.3.1.1"><p id="activedirectory_00044__p3496134113127">Parameter</p>
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<th align="left" class="cellrowborder" valign="top" width="80.03%" id="mcps1.3.5.2.5.2.2.2.3.1.2"><p id="activedirectory_00044__p184961241131217">Description</p>
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<tbody><tr id="activedirectory_00044__row84968417127"><td class="cellrowborder" valign="top" width="19.97%" headers="mcps1.3.5.2.5.2.2.2.3.1.1 "><p id="activedirectory_00044__p124963413125"><span id="activedirectory_00044__text136400224309"><strong>Restore To</strong></span></p>
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<td class="cellrowborder" valign="top" width="80.03%" headers="mcps1.3.5.2.5.2.2.2.3.1.2 "><p id="activedirectory_00044__p16496164110123">Only restoration to <span class="uicontrol" id="activedirectory_00044__uicontrol84961241181211"><b><span id="activedirectory_00044__text19159183316300"><strong>Original location</strong></span></b></span> is supported.</p>
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<tr id="activedirectory_00044__row349644119122"><td class="cellrowborder" valign="top" width="19.97%" headers="mcps1.3.5.2.5.2.2.2.3.1.1 "><p id="activedirectory_00044__p249664112126"><span id="activedirectory_00044__text820182793118"><strong>Location</strong></span></p>
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<td class="cellrowborder" valign="top" width="80.03%" headers="mcps1.3.5.2.5.2.2.2.3.1.2 "><p id="activedirectory_00044__p16496184121216">By default, the restoration location is displayed.</p>
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</p></li><li><span>Click <span class="uicontrol"><b>OK</b></span>.</span></li></ol>
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<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="activedirectory_00041.html">Restoration</a></div>
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